docs: def summarize_links(self, links_json):
          """
          The function for summarizing RDAP links in to a unique list.
          https://tools.ietf.org/html/rfc7483#section-4.2
  
          Args:
              links_json (:obj:`dict`): A json mapping of links from RDAP
                  results.
  
          Returns:
              list of str: Unique RDAP links.
          """
  
          ret = []
  
          for link_dict in links_json:
  
              ret.append(link_dict['href'])
  
          ret = list(unique_everseen(ret))
  
          return ret